Pinball/Video combination with video screen behind backglass. Elsewhere on the backglass is a single digital score display and a smaller credit/ball-in-play display. Playfield design is identical to Gottlieb's 1980 'Buck Rogers'.
According to The Complete Pinball Book and the game flyer pictured in it, the video game imaged in the backglass monitor is the familiar Space Invaders. The monitor screen showed Player 1 and Player 2 score displays and a credit display. Even so, 'Invader Ball' is evidently a one-player game and it is unknown if and how any on-screen scores and credits would correlate to the separate score and credit displays located elsewhere on the backglass.